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Compositions comprising particles of at least one polymer dispersed in a fatty phaseRelated Patent Categories: Drug, Bio-affecting And Body Treating Compositions, Live Hair Or Scalp Treating Compositions (nontherapeutic)Compositions comprising particles of at least one polymer dispersed in a fatty phase description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060078519, Compositions comprising particles of at least one polymer dispersed in a fatty phase. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] This application claims benefit of U.S. Provisional Application No. 60/580,362, filed Jun. 18, 2004, the contents of which are incorporated herein by reference. This application also claims benefit of priority under 35 U.S.C. .sctn. 119 to French Patent Application No. 04 06173, filed Jun. 8, 2004, the contents of which are also incorporated by reference. [0002] The present disclosure relates to compositions, such as cosmetic compositions, comprising particles of at least one polymer dispersed in a fatty phase. These compositions may be used, for example, for making up and caring for the skin, including the scalp, of the human face and body, and human lips and integuments, for instance the hair, the eyelashes, and the eyebrows. [0003] European Patent Application No. EP 1 002 528 discloses transfer-resistant compositions containing a dispersion of polymer particles in a volatile oil. These compositions predominantly contain a volatile oil, and also non-volatile silicone oils and non-volatile hydrocarbon-based oils. The non-volatile hydrocarbon-based oils are present in a very small amount, making up about 3% of the compositions. [0004] There is still a need for cosmetic products that have good staying power and that are comfortable to wear, comprising particles of at least one polymer dispersed in a fatty phase. The inventors have found, surprisingly, that by using a dispersion of polymer particles in combination with a maximum amount of volatile oil, compositions that may have good staying power, while at the same time may be comfortable to wear, can be obtained. [0005] In addition, the compositions with good staying power of the prior art often have the drawback of having little gloss. However, consumers nowadays are in search of products, for example lip and eyelid makeup products, that have good staying power and also a good level of gloss. In some embodiments, the compositions with good staying power according to the present disclosure may satisfy this need because they may also be glossy. [0006] The compositions of the present disclosure may, for example, be comprised in hair products and makeup products for the human body, lips, and integuments that have care and/or treatment properties. For instance, these compositions may be comprised in lipsticks and lip glosses, eyeshadows, tattoo products, mascaras, eyeliners, artificial skin tanning products, optionally tinted care creams and protective creams, hair dye products, and haircare products. [0007] In certain embodiments, the compositions with good staying power according to the present disclosure may be glossy, non-tacky, and may remain where initially deposited. When the compositions are applied to the skin or the lips, they may also afford a sensation of comfort on application and once deposited. [0008] One embodiment of the present disclosure is, for example, a composition, such as a cosmetic composition, comprising particles of at least one polymer dispersed in a fatty phase, wherein the fatty phase is free of volatile oil or comprises less than 50% by weight of volatile oils relative to the weight of the fatty phase. [0009] For example, the at least one polymer may be such that when it is dispersed in sufficient amounts in the compositions, the compositions may be capable of forming a deposit that has a resistance index of greater than or equal to 30%, for example greater than or equal to 40%, for instance greater than or equal to 45%, such as greater than or equal to 50%. [0010] The resistance index of the deposit obtained with the compositions according to the present disclosure is determined according to the measuring protocol described below. [0011] A support (40 mm.times.70 mm rectangle) comprising an acrylic coating (hypoallergenic acrylic adhesive on polyethylene film sold under the name Blenderme, ref. FH5000-55113, by the company 3M Sante) bonded onto a layer of polyethylene foam that is adhesive on the side opposite the one to which the adhesive plaster is fixed (foam layer sold under the name RE 40X70EP3 by the company Joint Technique Lyonnais Ind.) is prepared. [0012] The color L*.sub.0a*.sub.0b*.sub.0 of the support, on the acrylic coating side, is measured using a Minolta CR300 colorimeter. [0013] The support thus prepared is preheated on a hotplate maintained at a temperature of 40.degree. C. so that the surface of the support is maintained at a temperature of 330.degree. C.+-.1.degree. C. [0014] While leaving the support on the hotplate, the composition is applied to the entire non-adhesive surface of the support (i.e., to the surface of the acrylic coating), spreading it out with a brush to obtain a deposit of the composition of about 15 .mu.m. This deposit is then left to dry for 10 minutes. [0015] After drying, the color L*a*b* of the film thus obtained is measured. [0016] The color difference .DELTA.E1 between the color of the film relative to the color of the naked support is then determined via the following relationship: .DELTA.E1= {square root over ((L*-L.sub.0*).sup.2+(a*-a.sub.0*).sup.2+(b*-b.sub.0*).sup.2)} [0017] The support is then bonded via its adhesive face (adhesive face of the foam layer) to an anvil 20 mm in diameter and equipped with a screw pitch. A sample of the support/deposit assembly is then cut out using a sample punch 18 mm in diameter. The anvil is then screwed onto a press (Statif Manuel Imada SV-2 from the company Someco) equipped with a tensile testing machine (Imada DPS-20 from the company Someco). [0018] A strip 33 mm wide and 29.7 cm long is drawn on a sheet of white photocopier paper with a basis weight of 80 g/m.sup.2, a first line is marked 2 cm from the edge of the sheet, and a second line is then marked 5 cm from the edge of the sheet, the first and second lines thus delimiting a box on the strip; next, a first mark and a second mark located in the strip at reference points 8 cm and 16 cm, respectively, from the second mark, are applied. 20 .mu.l of water are placed on the first mark and 10 .mu.l of refined sunflower oil (sold by the company Lesieur) are placed on the second mark. [0019] The white paper is placed on the base of the press. The sample placed on the box of the strip of paper is then pressed at a pressure of about 300 g/cm.sup.2 exerted for 30 seconds. The press is then opened and the sample is again placed just after the second mark (i.e., next to the box). A pressure of about 300 g/cm.sup.2 is again exerted, and the paper is displaced, in a rectilinear manner as soon as the contact is made, at a speed of 1 cm/s over the entire length of the strip such that the sample passes through the water and oil deposits. [0020] After removing the sample, some of the deposit has transferred onto the paper. The color L*', a*', b*' of the deposit remaining on the sample is then measured. [0021] The color difference .DELTA.E2 between the color of the deposit remaining on the sample relative to the color of the naked support is then determined via the following relationship .DELTA.E2= {square root over ((L*'-L.sub.0*).sup.2+(a*'-a.sub.0*).sup.2+(b*'-b.sub.0*).sup.2)} [0022] The resistance index of the composition, expressed as a percentage, is equal to the ratio: 100.times..DELTA.E2/.DELTA.E1 [0023] The measurement is performed on 6 supports in succession, and the resistance index corresponds to the mean of the six measurements obtained with the six supports. [0024] In certain embodiments, the polymer may be such that, when it is dispersed in a certain amount in, the composition, the mean gloss at 20.degree. C. of a deposit of the composition, once spread onto a support, is greater than or equal to 30 out of 100. Continue reading about Compositions comprising particles of at least one polymer dispersed in a fatty phase... 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